isrstealer | 03c8fe9384be1b196bc0ac3fd578a16110fa73e16e64dda94ef6b93ee97cb998

Analysis

max time kernel
176s
max time network
185s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
30-11-2022 11:42

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General

Target

03c8fe9384be1b196bc0ac3fd578a16110fa73e16e64dda94ef6b93ee97cb998.exe
Size

979KB
MD5

23fe7f45473cb509c65b8e7d62210b40
SHA1

66842fba0fd099612c0b864ed145b17dea7360a9
SHA256

03c8fe9384be1b196bc0ac3fd578a16110fa73e16e64dda94ef6b93ee97cb998
SHA512

5b79c781a0d3e60dcfc4461414023fabffba62b0247129dc7e673a645e81af9680b9c5f7a7df88d7193a4d019f87db1beab957746e7247888bfb69a66ade74d6
SSDEEP

12288:X/I8SxX6H5G+d3+Q/lbJwgXt06doUe2LDdX7G4oWZqCt5MOxz2IhR7LwQSX3fw1k:MuGW7zdx5XJZUAi/Xvo1f7sr8

Score

10^/10

isrstealer stealer trojan upx

Malware Config

Signatures

ISR Stealer
ISR Stealer is a modified version of Hackhound Stealer written in visual basic.
trojan stealer isrstealer

ISR Stealer payload 4 IoCs

resource	yara_rule
behavioral2/memory/632-132-0x0000000000000000-mapping.dmp	family_isrstealer
behavioral2/memory/632-133-0x0000000000400000-0x000000000049B000-memory.dmp	family_isrstealer
behavioral2/memory/632-144-0x0000000000400000-0x000000000049B000-memory.dmp	family_isrstealer
behavioral2/memory/632-146-0x0000000000400000-0x000000000049B000-memory.dmp	family_isrstealer

UPX packed file 4 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/4084-139-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4084-141-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4084-142-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4084-143-0x0000000000400000-0x0000000000453000-memory.dmp	upx

Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 560 set thread context of 632	560	03c8fe9384be1b196bc0ac3fd578a16110fa73e16e64dda94ef6b93ee97cb998.exe	79
PID 632 set thread context of 4084	632	vbc.exe	80

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
632	vbc.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 560 wrote to memory of 632	560	03c8fe9384be1b196bc0ac3fd578a16110fa73e16e64dda94ef6b93ee97cb998.exe	79
PID 560 wrote to memory of 632	560	03c8fe9384be1b196bc0ac3fd578a16110fa73e16e64dda94ef6b93ee97cb998.exe	79
PID 560 wrote to memory of 632	560	03c8fe9384be1b196bc0ac3fd578a16110fa73e16e64dda94ef6b93ee97cb998.exe	79
PID 560 wrote to memory of 632	560	03c8fe9384be1b196bc0ac3fd578a16110fa73e16e64dda94ef6b93ee97cb998.exe	79
PID 560 wrote to memory of 632	560	03c8fe9384be1b196bc0ac3fd578a16110fa73e16e64dda94ef6b93ee97cb998.exe	79
PID 560 wrote to memory of 632	560	03c8fe9384be1b196bc0ac3fd578a16110fa73e16e64dda94ef6b93ee97cb998.exe	79
PID 560 wrote to memory of 632	560	03c8fe9384be1b196bc0ac3fd578a16110fa73e16e64dda94ef6b93ee97cb998.exe	79
PID 560 wrote to memory of 632	560	03c8fe9384be1b196bc0ac3fd578a16110fa73e16e64dda94ef6b93ee97cb998.exe	79
PID 632 wrote to memory of 4084	632	vbc.exe	80
PID 632 wrote to memory of 4084	632	vbc.exe	80
PID 632 wrote to memory of 4084	632	vbc.exe	80
PID 632 wrote to memory of 4084	632	vbc.exe	80
PID 632 wrote to memory of 4084	632	vbc.exe	80
PID 632 wrote to memory of 4084	632	vbc.exe	80
PID 632 wrote to memory of 4084	632	vbc.exe	80
PID 632 wrote to memory of 4084	632	vbc.exe	80

C:\Users\Admin\AppData\Local\Temp\03c8fe9384be1b196bc0ac3fd578a16110fa73e16e64dda94ef6b93ee97cb998.exe
"C:\Users\Admin\AppData\Local\Temp\03c8fe9384be1b196bc0ac3fd578a16110fa73e16e64dda94ef6b93ee97cb998.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:560
- C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
  C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:632
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\tmp.ini"
    3⤵
    PID:4084

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scripting

T1064

Persistence

Privilege Escalation

Defense Evasion

Scripting

T1064

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/560-136-0x0000000074B10000-0x00000000750C1000-memory.dmp

Filesize
5.7MB

Download
memory/560-147-0x0000000074B10000-0x00000000750C1000-memory.dmp

Filesize
5.7MB

Download
memory/632-133-0x0000000000400000-0x000000000049B000-memory.dmp

Filesize
620KB

Download
memory/632-144-0x0000000000400000-0x000000000049B000-memory.dmp

Filesize
620KB

Download
memory/632-146-0x0000000000400000-0x000000000049B000-memory.dmp

Filesize
620KB

Download
memory/4084-139-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4084-141-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4084-142-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4084-143-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download